Renault Navigation Flaw Lets SD Card Run Root Code
Researcher's published proof-of-concept shows aging in-car Linux software can be escalated to root from removable media.
Updated on Nov. 3, 2026 in Cybersecurity
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Security researcher Rasmus Moorats demonstrated that a 2014 Renault navigation unit can be made to run arbitrary root commands, with the research published November 2, 2026. The work is a research demonstration on a single vehicle head unit, not a reported in-the-wild attack.
Why it matters
The exploit chains a path traversal bug in a LOG command with a root-privileged parser that reads a script from an SD card at boot, showing how aging in-car software can turn a removable map card into an entry point. It matters now because the unit's custom Linux 2.6.28.10 system is roughly 15 years old and such devices remain in use.
The exploit was demonstrated on a 2014 TomTom Carminat LIVE unit running Linux 2.6.28.10, with a final script only three lines long. Whether the unit's design around 2011 software has been patched or how many vehicles share it is not addressed.
The players
Rasmus Moorats
Security researcher who discovered the root-command exploit on the Renault navigation unit.
TomTom
Maker of the Carminat LIVE head unit whose custom Linux-based navigation system was exploited.
Renault
Automaker whose 2014 Latitude model carried the affected navigation unit.
The details
The researcher built an emulator with QEMU to study the unit safely, since QEMU is open-source software that simulates a computer's hardware in software. The unit reads a script file named master.script from an SD card at boot, and a parser running as root executes it. A LOG command with a path traversal bug let the researcher write to /proc/sys/kernel/core_pattern, a Linux setting that controls what program runs when a process crashes, which he used to gain root control.
Timeline
2014: Renault Latitude model year of the affected navigation unit.
November 2, 2026: Research published showing the navigation unit exploit.
November 3, 2026: Article published on cybersecuritynews.com.
The Tech Race
The research shows that legacy embedded Linux in vehicles, here a 2.6.28.10 kernel, can be escalated through the same core_pattern technique used on general-purpose systems. It frames automotive head units as an attack surface that lags behind the patch cycles of consumer devices.
Owners of 2014 Renault Latitude vehicles with this TomTom Carminat LIVE unit could have a navigation system that accepts crafted SD card scripts running as root. The stub does not state available patches, pricing, or a timeline for fixes.
The takeaway
Watch for a manufacturer response from TomTom or Renault and whether a firmware update addresses the LOG path traversal and the root-privileged master.script parser. Drivers of affected 2014 Renault Latitude models can check with Renault about navigation software updates.
Further reading
For more on how such flaws are found and disclosed, browse the Cybersecurity section.
Source note: This article includes information reported by Cyber Security News.
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